"second string" meaning in English

{
  "forms": [
    {
      "form": "second strings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "second string (plural second strings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Sports",
          "orig": "en:Sports",
          "parents": [
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A unit of players which is considered to have a secondary level of talent and which usually plays after the first string."
      ],
      "id": "en-second_string-en-noun-b-oX8Cli",
      "links": [
        [
          "sports",
          "sports"
        ],
        [
          "unit",
          "unit"
        ],
        [
          "player",
          "player"
        ],
        [
          "secondary",
          "secondary"
        ],
        [
          "first string",
          "first string"
        ]
      ],
      "raw_glosses": [
        "(sports) A unit of players which is considered to have a secondary level of talent and which usually plays after the first string."
      ],
      "synonyms": [
        {
          "word": "junior varsity"
        }
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-second string.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/58/En-au-second_string.ogg/En-au-second_string.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/58/En-au-second_string.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "second string"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective"
      },
      "expansion": "second string",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "I got a new pair of shoes, so I think I'll use the old, second string pair in my garden."
        }
      ],
      "glosses": [
        "Not as good; of a lower quality or condition."
      ],
      "id": "en-second_string-en-adj-dltBmfPo",
      "links": [
        [
          "quality",
          "quality"
        ],
        [
          "condition",
          "condition"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Not as good; of a lower quality or condition."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-second string.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/58/En-au-second_string.ogg/En-au-second_string.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/58/En-au-second_string.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "second string"
}

{
  "categories": [
    "English adjectives",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English terms with audio links"
  ],
  "forms": [
    {
      "form": "second strings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "second string (plural second strings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "en:Sports"
      ],
      "glosses": [
        "A unit of players which is considered to have a secondary level of talent and which usually plays after the first string."
      ],
      "links": [
        [
          "sports",
          "sports"
        ],
        [
          "unit",
          "unit"
        ],
        [
          "player",
          "player"
        ],
        [
          "secondary",
          "secondary"
        ],
        [
          "first string",
          "first string"
        ]
      ],
      "raw_glosses": [
        "(sports) A unit of players which is considered to have a secondary level of talent and which usually plays after the first string."
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-second string.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/58/En-au-second_string.ogg/En-au-second_string.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/58/En-au-second_string.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "synonyms": [
    {
      "word": "junior varsity"
    }
  ],
  "word": "second string"
}

{
  "categories": [
    "English adjectives",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English terms with audio links"
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective"
      },
      "expansion": "second string",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English idioms"
      ],
      "examples": [
        {
          "text": "I got a new pair of shoes, so I think I'll use the old, second string pair in my garden."
        }
      ],
      "glosses": [
        "Not as good; of a lower quality or condition."
      ],
      "links": [
        [
          "quality",
          "quality"
        ],
        [
          "condition",
          "condition"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Not as good; of a lower quality or condition."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-second string.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/58/En-au-second_string.ogg/En-au-second_string.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/58/En-au-second_string.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "second string"
}